Framing attachment for carpenters&#39; squares.



J. D. WALL.

FRAMING ATTACHMENT FOR CARPENTERS SQUARES.

APPLICATION FILED MAY 11, 1912.

- Patented Apr. 29, 1913.

2 SHEETS-SHEET 1 COLUMBIA PLANOGRAPH CO..WASHINGTON. D. c

Wiinessw J. D. WALL. FRAMING ATTAGHMENT FOR CARPENTERS SQUARES.

APPLICATION FILED MAY 11, 1912.

Patented Apr. 29, 1913.

2 SHEETS-SHEET 2.

1, fl l I I l John D. WalL llwentari (5 6fM By his Afiomwgs COLUMBIA PLANonnAlm cam/As llllllllll c FBAIYEING ATTACHMENT E0 Specification of Letters Patent.

JOEE B. HALL, OF lvIIN'l'iEi-KPGLIS, llIZNNESOTA.

ARPEJTEES SQUARES.

Patented Apr. 29, 1913.

Application filed Ivlay 11, 1912. Serial No. 696,636.

T 0 all 107mm it may concern Be it known that 1, JOHN D. WALL, a citizen of tne United States, residing at Minneapolis, in the county of lrlennepin and State of Minnesota, have invented certain new and useful improvements in Framing Attachments for Carpenters Squares; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved framing attachment adapted for use in connection with an ordinary steel square, such as commonly used by carpenters and other mechanics, for obtaining all angles, bevels, and cuts required in roof work, hopper work,

and the like. To the above ends, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

The invention is illustrated in the accompanying drawings wherein like characters indicate like parts throughout the several views.

Referring to the drawings,-Figure 1 is a plan view of the improved framing tachment having applied thereto an ordinary oarpenters square; Fig. 2 is a detail view in plan of the keeper at the aXis of the quadrantal head; Fig. 3 is a detail view in plan of the keeper on the straight edge bar; Fig. 4 is detail view in plan of the joint and latch atthe intermediate portion of the straight edge bar; Fig. is a transverse sec tion taken on the line a m of Fig. 1; 6 1s a longitudinal section taken on the line a a of Fig. 1; Fig. 7 is a transverse section taken on the line 50 a of Fig. 1, some parts being shown in a different position, and Figs. 8 and 9 are plan views of the two face plates of the quadrantal head.

The numeral 1 indicates an ordinary steel square having a long and a short leg, such as commonly used by carpenters and other mechanics. I

Referring in detail to the improved framing attachment, the numeral 2 indicates. as an entirety, a hollow quadrant-a1 head preferably made, as shown, from pressed metal for the sake of lightness, but of course may be made of any suitable material. The face plates 3. and 4: of the quadrantal head 2, ex

tend beyond the periphery of said head, thereby forming a segmental channel 5, the purpose of which will presently appear. Each face plate 3 and 4 is graduated into ninety degrees, as indicated by the numeral 6. These face plates 3 and l are also of such size as to extend slightly beyond the zero and ninety degree edges thereof to afford narrow marginal. strips, respectively 3 and 3". Secured to and projecting from the ninety degree edge of the quadrantal head 2, is a straight edge bar 7, having its outer or working edge alined with the zero edge of the quadrant-a1 head 2. This straight edge bar 7 is preferably made of wood or some light material, such as tubing, and is of the same thickness as the quadrantal head 2, thereby bringing the two faces into the same planes with the face plates 3 and t.

Marked, or otherwise indicated, on each face of the straight edge bar 7, is a longitudinally extended scale 8 with their Zero points located at the axis of the quadrantal head 2 extending to the outer end of the bar 7. in Fig. 1, the quadrantal head 2 is at the left with respect to the straight edge bar 7, but when the other side of said bar is used, the same is turned end to end, which will bring the quadrant-al head 2 at the right thereof. To permit the straight edge bar 7 to be folded into a compact space when not in use, the same is, as shown, preferably made in two sections and connected at the joint therebetween by means of a hinge 9 so arranged as to permit the two sections of the straight edge bar 7 to be folded back to back, as indicated by dotted lines in Fig. 1. Contact blocks 10 and 11 are formed or rigidly secured, respectively, to the zero edge of the quadrantal head 2 and the outer end portion of the straight edge bar 7 Also rigidly secured to the outer section of the straight edge bar 7 and overlapping the joint between the sections of the said bar, is an intermediate or third contact block 19.. This block, atits free end, is detachably secured or locked to the inner section of the bar 7, by means of a spring clasp 13. The outer or working faces of the three contact blocks 10, 11, and 12 are all alined and are adapted to engage the timber or other object to which the improved framing attachment is applied.

hlounted for pivotal of the two face plates 3 movements on either and 4c, is a flat metal lie arm 14. In the inner end portion of the arm 14, is punched or cut a pair of round holes 15 located transversely opposite one another and each thereof is also located close to one of the longitudinal edges of the arm 14. A keeper 16 in the form of a loop is adapted to telescopically receive the long leg of the square 1 and hold the same against all movements except endwise sliding movement. The keeper 16 is provided at one end with a depending pivot pin 17, mounted for pivotal movement, in a seat 18, extending transversely through the quadrantal head 2, at the axis thereof. On the projecting end of the pivot pin 17, is a head 19 which holds the said pin against removal from the seat 18. The pivot pin 17 also extends through one of the holes or seats 15, to wit, the one nearest the zero edge of the quadrantal head 2 and thereby pivotally connects the arm 14 to the axis of said quadrantal head 2. When tne arm 14 is attached to the face plate 4. the pivot pin 17, of course, will project through the opposite hole or seat 15, through which it projects, as shown in Fig. 1. By reference to Figs. 1 and 3, it will be noted that the keeper 16 is so related to the axis of the quadrantal head 2 as to always hold the working edge of the long leg of the square 1 directly over said axis. In the top bar of the keeper 16, is a sight opening 16 for the purpose of exposing the scale on the square 1 at the axis of the quadrantal head 2. The extreme outer end of the arm 14 extends just beyond the segmental edges of the face plates 3 and 4 and is then bent laterally downward to form a depending finger 20, as best shown in Fig. 6. This finger 20 is arranged to work close to the segmental edges of the face plates 3 and 4 and on its inner face, is rigidly secured a guide block 21 which works within the channel 5 and thereby holds the arm 14, in close engagement with either of the face plates 3 and 4. Formed in the periphery of the quadrantal head intermediately between the two face plates 3 and 4, is a long slot 22. WVo-rking within the slot 22, is a draw bolt 23 having a square head located Within the quadrantal head 2 and of such size as to be held against rotation by said head. The outwardly projecting end of the bolt 23 extends completely and loosely through the guide block 21 and finger 20 and'has mounted thereon by screw threaded engagement, a thumb nut 24. As is evident, by tightening the thumb nut 24, the guide block 21 will be frictionally clamped onto the periphery of the quadrantal head 2 and thereby holds the arm 14 in different set adjustments. The slot 22 is of such length as to permit the arm 14 to be moved ninety degrees. Embracing the arm 14 and slidably mounted thereon, is a second keeper 25 adapted to telescopically receive the outer end portion of the long log of the square 1 and hold the same against all movements except endwise sliding movement.

Slidably mounted on the straight edge bar 7 is a U-shaped bracket 26, having its free ends bent laterally and toward each other to form retaining lugs 27. These lugs are arranged to overlie and engage the working edge of the straight edge bar 7 Both sides of the contact blocks 11 and 12 are,cut away to afford grooves 28, through which the retaining lugs 27 are free to pass as the bracket 26 is moved on the straight edge bar 7. Mounted in the transverse portion of the bracket 26 and having screw threaded engagement therewith, is a set screw 29, arranged to impinge against the adj acent face of the straight edge bar 7 and thereby frictionally hold the bracket- 26 in different set positions with respect to the straight edge bar Swiveled at 30, to the top member of the bracket 26, and adjacent to the transverse portion thereof, is a keeper 31 of substan tially the same form as the keeper 25, but of such size as to telescopically receive and hold the short leg of the square 1.

Mounted in the top members and intermediate portions of the keeper brackets 16, 25,

and 31, and having screw threaded engagement therewith are, respectively, set screws 32, 33, and 34, with their inner ends ar ranged to impinge against the adjacent portions of the square 1 and thereby hold the same in different angular adjustments with respect to the straight edge bar 7.

Referring to some of the different uses of the improved framing attachment,in Fig. 1, the square 1 is clamped onto the improved framing attachment in a position to give the plumb cut and the level or seat cut of a hip rafter of a four sided or common roof having a one-third pitch or an eight inch rise per foot run. The short leg or eight inch side of the square will, of course, give the plumb cut and the long leg, or approximately seventeen inch side of a square, will give the level or seat out. By reference to Fig. 1, it will be noted that the scale 5 on the straight edge bar 7 gives the length of the rafter, per foot run, at a point where the short leg of the square intersects said scale, to wit, eighteen and three-fourths inches, or if taken in feet will give the entire length of the hip rafter for a twenty-four foot house. It is, of course, understood that by properly adjusting the square, the length of a rafter for any sized roof may be obtained. To secure parallel or proportional cuts to those which may be obtained by the square 1 shown in Fig. 1, in case shorter cuts are needed in a fractional part of a foot, the set screws 29, 34, 32, and 33, are loosened and the long leg of the square 1 is moved endwise in the keepers 16 and 25 to the required position. After the square 1 is reset, the same is again clamped to the arm 14 by means of the set screws 29 and 34. Of course, during the resetting of the square 1, the arm 14 remains fixed with respect to the quadrantal head 2, in order to keep the said square in the same angular adjustment with respect to the straight edge bar 7. During the readjustment of the square 1, the bracket 26 and the keeper 31 carried thereby, are automatically reset with respect to the straight edge bar 7. To vary the pitch of the roof from that just described, it is only necessary to swing the arm 14 on the axis of the quadrantal head 2 thereby carrying the square 1 into a different angular adjustment with respect to the straight edge bar 7 All the notations between the segmental lines opposite the numeral 4, in the space 3 on the face plate 3, relate to a four sided polygon and all those opposite the numeral 5 relate to a five sided polygon, and so on down to and including a twelve sided polygon. For instance the principle just described and shown in the drawings, is for a four sided polygon and the zero edge of the arm 14 is at the numeral 8, opposite the numeral 4 in the space 3 which indicates a one-third pitch or an eight inch rise per foot run. In Fig. 8 of the drawings, the zero edge of the arm 14 is indicated by dotted lines. To secure the plumb cut and the level, or seat cut, of a common rafter, the arm 14 is set at the numeral 8 in the space 0 on the face plate 3 which will give a onethird pitch to the roof. The diagonal lines I), on the face plate 3, and numbered from 3 to 12, inclusive, indicate different sided polygons and are for securing side cuts of common or jack rafters and the face cut of sheeting for the same roof may be obtained by using the opposite side of the square. Lap cuts and joint cuts may be obtained in the spaces indicated, respectively, by the letters Z and 7'. Edge or hopper cuts of the difierent polygons may be obtained in the space 6 on the face plate 4, and the numerals at the end of said spaces indicate the number of sides of the polygon. The diagonal lines it on the face plate 4 numbered 3 to 12 inclusive, indicate the different sided polygons, and are for securing the side cuts of hip rafters.

It is, of course, understood that any angle required in the work may be obtained by setting the arm 14 with respect to the degrees indicated in the spaces 6 on both face plates 3 and 4.

What- 1 claim is:

1. The combination with a carpenters square, of a straight edge bar having marked thereon a longitudinally extended scale, an arm pivotally attached to said straight edge bar at the zero point of the scale marked thereon, and means for adjustably clamping one of the legs of said square onto said arm, with the other of said legs overlapping said straight edge bar.

2. The combination with a carpenters square, of a straight edge bar naving marked thereon a longitudinally extended scale, an arm pivotally attached to said straight edge bar at the zero point of the scale marked thereon, means for adj ustably clamping one of the legs of said square onto said arm, with'the other of said legs overlapping said straight edge bar, and means for clamping said arm in different predetermined adjustments with respect to the straight edge bar.

3. The combination with a carpenters square, of a straight edge bar having marked thereon a longitudinally extended scale, an arm pivotally attached to said straight edge bar at the zero point of the scale markedthereon, a keeper bracket adjustably mounted on said straight edge bar, and means for adjustably clamping the legs of said square onto said arm and said keeper bracket.

4. The combination with a carpenters square, of a straight edge bar having marked thereon a longitudinally extended scale, an arm pivotally attached to said straight edge bar at the Zero point of the scale marked thereon, a keeper bracket slidably and pivotally mounted on said straight edge bar, means for clamping said keeper bracket onto said straight edge bar in different adjustments, and means for adjustably clamping the legs of said square onto said arm and said keeper bracket.

5. The combination with a carpenters square, of a straight edge bar, a quadrantal head secured to said straight edge bar and graduated in degrees, an arm pivotally attached to the axis of said head, means for adjustably clamping either leg of said square onto said arm, and means for holding said arm in different adjustments with respect to said head.

6. The combination with a carpenters square, of a straight edge bar, a quadrantal head secured to said straight edge bar and graduated in degrees, an arm pivotally attached to the axis of said head, means for holding said arm in different adjustments with respect to said head, a keeper bracket adjustably mounted on said straight edge bar, and means for adjustably clamping the legs of said square onto said arm and said keeper bracket.

7. The combination with a carpenters square, of a straight edge bar having marked thereon a, longitudinally extended scale, a quadrantal head secured to said straight edge bar and graduated in degrees, the axis of said head being located at the zero point of the scale on said straight edge bar, an

a m pivo ally tta ed to h axis f sa d 0;? said squar Q iQ sai nd Said i 9991' 11 ead,'mean s for holding said a rlnil difienhyac get. I ent adjustments with respect to said head, a In i6S ti I1 10 11y whereof I afiizg my Signatyl'fi; keeper bracket slidably and piifo'ta'lly in presence o'f'two Witnesses.

mounted on said straight edge bar, means JOHN D. WALL. for clamping said keeper bracket onto said Witnesses: straight edge bar in different adjustments, MILDRED L. MUMMA, and means for adj ustably clamping the legs HARRY D. KILGORE.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patent. Washington, D. G. 

